机构：[1]The Second Clinical Hospital of Lanzhou University, Lanzhou 730000, China[2]The Second Out-Patient Department, National Defence University of PLA, Beijing 100039, China[3]Department of Radiation Oncology, PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China[4]Department of Radiation Oncology, Sichuan Cancer Hospital, Chengdu 610041, China四川省肿瘤医院
On-line megavoltage computed tomography (MVCT) images are used to verify patient daily set-up in Hi-ART helical TomoTherapy unit. To evaluate the patient dose from MVCT scanning in image guidance, weighted computed tomography (CT) dose index (CTDIw) was measured with PTW TM30009 CT pencil chamber in head and body phantoms for slice thicknesses of 2, 4 and 6 mm with different scan lengths. Dose length products (DLPs) were subsequently calculated. The CTDIw and DLP were compared with XVI kV CBCT and Brilliance simulator CT for routine clinical protocols. It was shown that CTDI and DLP had close relationship with the slice thickness and the scan length. The dose distribution in the transversal plane was very inhomogeneous due to the attenuation of the couch. Patient dose from MVCT was lower than XVI CBCT for the head scan, while larger for body scan. CTDIw, which is measured easily and reproducibly, can be used to assess the patient dose in MVCT. Regular measurement should be performed in QA & QC programmes. Appropriate slice thickness and scan range should be chosen to reduce the patient dose.
语种：
外文
被引次数：
WOS：
PubmedID：
中科院(CAS)分区：
出版当年[2016]版：
大类|4 区环境科学与生态学
小类|4 区环境科学4 区核科学技术4 区公共卫生、环境卫生与职业卫生4 区核医学
最新[2023]版：
大类|4 区环境科学与生态学
小类|4 区环境科学4 区核科学技术4 区公共卫生、环境卫生与职业卫生4 区核医学
JCR分区：
出版当年[2016]版：
Q3NUCLEAR SCIENCE & TECHNOLOGYQ4ENVIRONMENTAL SCIENCESQ4PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTHQ4RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
最新[2023]版：
Q4ENVIRONMENTAL SCIENCESQ4NUCLEAR SCIENCE & TECHNOLOGYQ4PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTHQ4RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
第一作者机构：[1]The Second Clinical Hospital of Lanzhou University, Lanzhou 730000, China[2]The Second Out-Patient Department, National Defence University of PLA, Beijing 100039, China
通讯作者：
推荐引用方式(GB/T 7714)：
Liu Minglu,Wang Yunlai,Liao Xiongfei.COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT[J].RADIATION PROTECTION DOSIMETRY.2016,171(3):370-374.doi:10.1093/rpd/ncv393.
APA：
Liu, Minglu,Wang, Yunlai&Liao, Xiongfei.(2016).COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT.RADIATION PROTECTION DOSIMETRY,171,(3)
MLA：
Liu, Minglu,et al."COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT".RADIATION PROTECTION DOSIMETRY 171..3(2016):370-374
